Improvement in rolling-die apparatus



EEnvEY WATERS, or BOSTON, MASSACHUSETTS.

llVlPRO'VEM-ENT IN ROLLING-DIE APPARATUS.

Specification forming part of Letters Patent No. 59,488, dated November 6, 1866.

To all whom it may concern:

Be it known that I, HERVEY WATERS, of

y Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Machines for Shaping and Reducing Metal by Rolling; and I do hereby declare that the following, taken in connection with the drawings which accompany and form part lof this specification, is a description of my invention suflicient to enable those skilled in the art to practice' it.

The machine shown in the drawings, and embodying my invention, is of that variety in which the rolls operate on the metal with a part only of their peripheries, the rolls being so formed as to leave an open space between them during a portion of each revolution, so that the metal to be rolled may be thrust through said space at such times, to be seized by the die-shaped grooves formedin those portions of .the rolls which come into or nearly into Contact, and will be returned by the rolling action toward its starting-place.

My invention relates, chiefly, to the combination with such rolls of means for positively moving the metal to the diegrooves and withdrawing it therefrom, when so arranged as to admit of variations from such movements, this preventing breakage of thev mechanism by which the metal is held and moved in its passage to and from the die-grooves of therolls; and my invention consists, rst, in combining'with such rolls and a cam and weight in connection therewith, and a tongs or holder of the metal to be rolled, a spring so arranged that it may yield to allow the cam.

to move the mechanism which actuates the tongs faster than the metal held by the tongs is permitted to move, by the action thereupon of the die-grooves; also, in combination with the rolls and any suitable means for working the tongs, of yielding nippers, which, in case of accident or derangement, permit motion.. of the prime motor of the tongs without cor-` responding movement of these, or breakage of the connections therewith. Y

Of the drawings, Figure l isl a perspective view of the machine looking toward the right, and Fig. 2 is a similar view looking toward the left.

Of the parts of the machine which perform the actual labor of rolling I propose only to describe theform of the die-grooves, which may be seen developed in Fig. 3, this showing one groove designed for rolling round taper shapes-such as rat-tail-le blanks, for example-fand another groove for rolling square taper shapes, the development being on an.

enlarged scale, and the dotted lines showing sectional shapes of the grooves at the places indicated.

It will be observed that the flare given to the grooves beyond their real forming shape extends less than half the distance from the surface of the roll to the apex of the angle of the square groove, and correspondingly in the example ofthe round forming-groove, so that any metal moved by the rolling operation into the space of the flared widening of the grooves will at the lnext operation of the rolls, when the tongs are turned ninety degrees, be presented to and shaped by the bottoms of the grooves.

To the gear-wheel a on the shaft of the lower roll, and by which the mill is driven, is secured the cam b, so as to be capable of adjustment thereon, this wheel and cam being shown in detail in Fig. 4- as removed from the mill, with their inner faces exposed. This cam b, rotating with the die-rolls, operates, by the roll or pin c, the rocker-arm d, to

which it is fixed, this rocker-arm and other parts therewith closely connected being most clearly shown in Fig. 5, which exhibits the mechanism concealed from view between the gear a and its adjacent housing.'

The rocker-arm d is 'xed tov rocker-shaft e, which is mounted in a suitable bearing on each housing, and to this rocker-shaft there is secured the weight f by means ,of an arm, the design and tendency ofthe weight f being to keep the pin c of the rocker-arm cl pressed against the cam b.

rEhe rocker-arm, by means of the link g, reciprocates on the ways h the cross-head l', and this, by means of a pin in lever j, which enters a slot in the cross-head, vibrates said lever and gives motion to the tongs-carrier lt', reciprocating it on the slidesl l, the lever j being connected with the tongs-carrier lc by a link, m.

The lever j 1s pivoted to a carriage, n, which may be moved laterally with respect to the rolls, so as to bring the piece to be rolled opposite any of the grooves which may be formed therein, the slot in the cross-head 'i permitting this change of position in the carriage n without aecting the movements imparted to the tongs-carrier by means of leverj.`

On the link g is fitted- -so as to slide thereon a sleeve, 0, and spiral spring` o. bearing against a stop iixed on link g, near its point of attachment to the cross-head1.

The connection between the rocker-arm d and the link g is obtained by meansof nippers p, which are held closed together by means of a spring, zo, which forces the jaws of .the nippers into a groove turned in the sleeve o, so that under ordinary circumstances the nippers will hold in the groove, and will, thfrough the springe', give movement to the link g,- but if from any cause the cross-head 'i is keptfrom moving back from the rolls, the jaws of the nippers will slip out of the groove in the sleeve when the positive action of the cam b shall have considerably compressed spring o', and then the nippers will be carried over the smooth surface of the sleeve o to the extent due to the action of the cam b on the rocker-arm d.

It may now be seen that the movement of the tongs-carriage toward and from the rolls is intended to be, and will be, relative to the movement given the cross-head i by the cam 1 1, said cam being so made that the movement imparted thereby through the described connections in causing the tongs-carriage to retreat from the rolls shall be coincident with the movement imparted to the pieceof 1metal i by and under control of the rolls.

When from the turning down of the rolls,

necessitated by the wear thereof, the moveup to the rolls, while at the same time the cam is negative in its action in not compelling the tongs-carrier to approach the rolls, so that in case of obstruction or derangement, the eiiect produced is the lack of proper presentation of the work to the die-rolls, and not the breakage of the mechanism governing the movement of the tongs.

' Inspection of the drawings will show that the tongs themselves may be rotated on the longitudinal axis of the piece to be rolled, and

that they are provided with a gage or index,

' which determines the number of degrees of such turning; also, that they are provided with a system of levers by which they are conveniently operated to grasp and release such pieces of metal asit is desired to present' to the action of the die-rolls, and that the tongs l are so attached to their carrier that by com-i pressing a spiral spring on 011e member of the tongs, they may yield slightly without effecting the lifting of the weight, thus giving time in which to overcomefits inertia. i Mechanismfor locking the lateral carriagcl` n so as to bring the work opposite either groove found in the rolls and retain it there. is also provided, but needs no description here, as it will forni no part of the matter herein claimed.

Having described the means for presenta f the work to the action of the rolls, and ofi tracting it therefrom, and the operation anc,

conduct of those means under the varied con-i ditions which are likely to occur, both normal 1 4the rocker-arm d in the position given it by the eXtreme throw of cam b, which farthest Kremoves the tongs from the rolls, so that continuedrotation of the mill will not cause move ment of the rocker-arm till it is released from the latch, so that the weight f will bring the pin cinto contact with cam b. This latchV is pivotcd `to bearings 1" r, made fast to the sida of one of the housings, the spring s pressing -it constantly toward the rocker-arm d.

Connected with the body of the latch so as to move therewith, and also to move relatively thereunto, is abolt, t, which can be moved forward into the position shown in Fig. 5 by the operator in depressing the horizontal arm,

of the bent lever u. When so depressed, thel bolt t is in the path of rotation of the projec-y tion or cam o, fixed on the wheela, so that when the cam fv strikes the bolt t the, latch'lgl is moved sidewise, and releases the rocker-arm1 d from its hold, and the weight f then causesi the arm d to move, keeping its pin c inV con` tact with cam b while it rotates, and causes the tongs to move up to the rolls. l In the continued. rotation of cam b, the; weight f is elevated and the tongs are retracted'to their greatest extent, in which condition the latch is forced, by spring s, upon and holds the rocker-arm from vibration, the operator having released bent lever u, anda spring connected therewith having retracted the bolt t, so thatv the cam t, in its rotation, will not again release the rocker-arm from the latch till the operator again thrusts the bolt t forward.

I claim 1. Combining with the rolls, and a cam and weight in connection therewith, and a tongs .l 59.485v Y s.

l v l or holder. of the metal to be rolled, a spring the rolls and any suitable means for Working l sol arranged that it may yield to allow-the cam the tongs. C to move the mechanism which aouates the tongs faster than the metal held by the tongs HERVEY WATERS l is permitted to move, by the action thereupon Witnesses: l" of the diegrooves, substantially as described. J. B. CROSBY, i: 2. The yielding nippers, in combination with S. B. KIDDER.

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